/Engine/Source/Runtime/Engine/Public/LevelInstance/LevelInstanceSubsystem.h
Returns the upper chain of level instance actors for the specified level starting with the level instance referencing the level.
void ForEachLevelInstanceActorAncestors ( const [ULevel](API\Runtime\Engine\Engine\ULevel) * Level, [TFunctionRef](API\Runtime\Core\GenericPlatform\TFunctionRef)< bool([AActor](API\Runtime\Engine\GameFramework\AActor) *)> Operation ) const